• Journal of the Society of Cosmetic Scientists of Korea
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• v.7 no.1
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• pp.1-18
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• 1979

인삼(人蔘)사포닌으로 처리(處理)한 모발(毛髮)의 인장강도(引張强度)와 신장도(伸張度)를 collagen 가수분해물(加水分解物)로 처리한 모발(毛髮)과 비교(比較)하였다. 모발(毛髮)에 인삼(人蔘)사포닌 흡수량(吸收量)은 high speed liquid chromatography로 측정(測定)하였으며 liquid scintillation counter로 확인(確認)하였다. 모발(毛髮)에 collagen 가수분해물(加水分解物)의 흡수량(吸收量)은 모발(毛髮)을 collagen 가수분해물(加水分解物) 용액(溶液)속에 침적(沈積)시켰을 때 처음 30분(分) 동안은 많은 량(量)의 흡착(吸着)이 일어났으나 1시간(時間) 경과후(經過後)부터는 더 이상(以上)의 증가(增加)는 보이지 않았다. 이와는 반대(反對)로 인삼(人蔘)사포닌의 경우(境遇)는 침적시간(沈積時間)의 증가(增加)에 비례(比例)하여 흡수량(吸收量)의 증가(增加)를 나타내었다. 실험결과(實驗結果)는 인삼(人蔘)사포닌이 collagen 가수분해물(加水分解物) 보다 모발(毛髮)에 더욱 효과적(效果的)임을 보여 주었고, 그리고 인삼(人蔘)사포닌의 모발(毛髮)에 대(對)한 흡수(吸收)와 인장강도(引張强度)의 증가(增加)는 모발(毛髮)의 strain-stress곡선(曲線)과 인삼(人蔘)사포닌의 계면활성(界面活性)에 의(依)해 설명(說明)하였다.

• Applied Chemistry for Engineering
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• v.9 no.4
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• pp.516-522
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• 1998

In this study, a water adsorbent was synthesized by radiation grafting of acrylic acid and multifunctional monomers such as 1,2-propanediol dimethacrylate (PDMA) and 1,1,1-trimethylolethane triacrylate (TMETA) onto cellulose and its subsequent treatment with 5% NaOH. Its absorbency on $H_2O$ and 0.9 % NaCl aqueous solution was examined. The highest absorbency on water and on 0.9% NaCl aqueous solution was obtained from the addition of 0.75 vol % PDDMA and of 1.0 vol % TMETA onto acrylic acid solution, respectively. The absorbency of commercial hygienic band on water and NaCl aqueous solution was 21 g/g and 22 g/g, respectively. However, that for acrylic acid-grafted cellulose including TMETA was 298 g/g and 54 g/g, respectively.

• Journal of the Society of Cosmetic Scientists of Korea
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• v.30 no.1
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• pp.117-122
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• 2004

Exessive UV radiation causes a lot of problems in our skin. In order to find out the alternative UV absorber that can safely be used in cosmetics, we have screened various natural extracts in terms of their UV absorbing effect. Some natural extracts, which possess antioxidative activities, have also been found to retard the oxidation process in our experiment. Natural compound such as 7-hydroxycymopol, baicalein, etc. could be transformed into adjuvant UV absorber by chemical modification. In cosmetics, its chemical stability against UV radiation, exposure to oxygen and other factors could be improved by using the silicone or W/S type emulsion. The values of MED (minimal erythema dose) were improved to 0.10 ${\pm}$ 0.02∼0.11 ${\pm}$ 0.02 by adding this natural extract into the cosmetic formulations. In conclusion, the results of the present study show that natural extracts could be used as an adjuvant UV absorber, if they are stabilized.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.33 no.3
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• pp.33-36
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• 2004

냉방에너지에 대한 분석과 전기냉방에 대한 가스냉방의 경제성 및 향후 가스냉방의 보급전망을 기술하였다. 가스냉방 부하 가스냉방은 80년대 중반부터 하절기 최대 전력수요 억제의 일환으로 보급이 본격화되기 시작했으며 가스 흡수식 냉방기 및 냉온수기의 공급으로 대규모 건축물의 냉난방에 대한 개념이 서서히 바뀌기 시작하였다. 92년 7월 “건축물의 냉방설비에 대한 설치 및 설계기준” 이 제정, 시행됨에 따라 일정규모 이상의 건축물에 중앙집중식 냉방설비 설치시 주간 최대 냉방부하의 60% 이상을 가스냉방 또는 축냉식으로 설치 의무화됨으로써 냉방은 물론 난방까지 겸하는 흡수식 냉온수기의 보급이 크게 증가하고 있다.(중략)

• Proceedings of the Korean Society of Disaster Information Conference
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• 2023.11a
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• pp.337-338
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• 2023

본 논문에서는 유류 오염물의 흡수 반응이 가능한 반응재료에 대하여 지중 구조 재료로서의 적용성 검토를 목적으로 배합조건에 따른 다짐시험을 실시하였다. 다짐시험 결과, 주요 반응물질이 최적함수비에 미치는 영향은 미미하였으나, 최대건조단위중량의 영향인자로 평가되었다.

• Proceedings of the Optical Society of Korea Conference
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• 2000.02a
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• pp.166-167
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• 2000

일반적으로 수십 피코초 레이저 펄스를 이용한 GaAs bulk 상태 시료의 비선형 흡수 관찰 실험에서는 200Mw/$cm^{2b}$ 이하에서는 여기된 자유전하 운반자 흡수효과는 무시한다.$^{(1)}$ 그러나 수 나노초의 레이저 펄스를 이용할 경우, 이광자 흡수에 의해 여기된 자유전하 운반자들이 긴 수명시간으로 인해 재결합되지 않고 여기된 상태에 축적되어 짐에 따라, 레이저 빛을 재흡수 하는 확률이 높아져 낮은 세기의 빛에도 불구하고 비선형 흡수 효과가 크게 나타난다.$^{(2)}$ 불순물이 첨가되지 않은 GaAs bulk 상태의 경우 자유전하 운반자 소멸 시간은 수 나노초 영역으로 알려지고 있다.$^{(4)}$ 본 실험에서는 수 MW/$cm^2$의 매우 낮은 영역의 세기에서 순수한 GaAs의 bulk에 대하여 실험한 결과 비선형 흡수가 나타남을 관찰하였으며, 더불어 자유전하 흡수 계수를 여러 가지 세기의 빛에서 측정한 결과 자유전하 흡수 단면적이 빛의 세기에 따라 변화하는 것을 관찰하였다. (중략)략)

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.10
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• pp.844-853
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• 2002

A dynamic model which simulates the coupled heat and mass transfer within a vertical tube absorber was developed. The liquid film is a binary mixture of two components, and both of these components are present in the vapor phase. The pressure, concentration, temperature and mass flow rate of the vapor are obtained by assuming that the pressure is uniform within an absorber. The model was applied to an absorber for an ammonia/water absorption refrigerator. The transient behaviors of the pressure, the outlet temperature and the concentration of the solution and the cooling water outlet temperature on a step change at the absorber inlet of the cooling water temperature, the vapor mass flow rate and the concentration of the solution were shown.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2013.05a
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• pp.1453-1454
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• 2013

• Journal of the Earthquake Engineering Society of Korea
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• v.5 no.5
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• pp.47-56
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• 2001

In order to assure the safety of NPP structures, margin of safety or conservatism is incorporated in each design step. Seismic risk evaluation of NPP structures is performed based on the realistic capacity and response of structure eliminated the safety margin and conservatism. In this study, the comparative study on the various evaluation methods of the inelastic energy absorption capacity was performed. The inelastic energy absorption capacity due to the nonlinear behavior of structures has significant effect on the results of seismic probabilistic risk assessment. And the comparison study of the HCLPF(high confidence of low probability of failure) values according to the inelastic energy absorption factors was performed. As a conclusion, the inelastic energy absorption factor of NPP containment structure is estimated about 1.5~1.75. It is essential to estimate the nonlinear behavior of structure and its ductility factor correctly for the seismic risk assessment.

• Journal of the Korea institute for structural maintenance and inspection
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• v.12 no.5
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• pp.91-100
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• 2008

A technique strengthened to the reinforced concrete members using the external post- tensioned method offers the advantages in speed and simplicity of installation over other, established, strengthening techniques. But this technique has many unreasonable facts. This paper are analyzed an unreasonable facts of the previous external post-tension technique. The purpose of this paper proposed Bow system as the new technique strengthened to the reinforced concrete members. The Bow system which is better technique than the previous technique was introduced with the experimental/analytical data.